Linked duplicate of parent/children: how to link transform properties of children?
To duplicate multiple objects in different positions and keep the relationship between each instance, you want to use DupliGroups.


Select the objects you want to duplicate.
Add them to a group &#9096; CtrlG
You can rename the group so that it is more meaningful.
Add an empty
Set the empties Duplication setting to group and choose the group you created.
Repeat the last two steps as needed.